MODELLING SUBMARINE CONTROL SURFACE DEFLECTION DYNAMICS

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Authors
  1. Watt, G.D.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
An algorithm is presented for modelling the time response of a lifting surface control system to an arbitrary set of commands. Response dynamics are governed by a linear, second order, ordinary differential equation. This allows the control system response frequency and damping to be modelled, as well as current control surface position and rate of change of position to be matched when a new command is issued. In order not to exceed the rate limit of the control system, yet maintain continuity in the response and its high order derivatives in time, the algorithm reduces response frequency when large deflection changes are required. This approach is compared to a common first order model, and to a second order model having piecewise continuous high order time derivatives but which always models both response frequency and rate limit.
Report Number
DREA-TM-90-203 — Technical Memorandum
Date of publication
15 Mar 1990
Number of Pages
24
DSTKIM No
90-02869
CANDIS No
65126
Format(s):
Document Image stored on Optical Disk;Originator's fiche received by DSIS

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